Structure and fracture mechanism of a two-phase chromium–nickel alloy during high-temperature deformation

The structure and mechanical properties of a two-phase Kh65N33V2FT alloy has been studied after tests at room and high temperatures. The morphology of the main phases, namely, solid solutions of nickel in chromium (α) and chromium in nickel (γ), is changed depending on temperature. The lattice param...

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Bibliographic Details
Published in:Physics of metals and metallography 2016-09, Vol.117 (9), p.937-944
Main Authors: Mironenko, V. N., Aronin, A. S., Vasenev, V. V., Aristova, I. M., Shmyt’ko, I. M., Trushnikova, A. S.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Chromium
Deformation
Fracturing
Materials Science
Metallic Materials
Metallography
Morphology
Nickel
Phases
Strength and Plasticity
Thermal resistance
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Summary:The structure and mechanical properties of a two-phase Kh65N33V2FT alloy has been studied after tests at room and high temperatures. The morphology of the main phases, namely, solid solutions of nickel in chromium (α) and chromium in nickel (γ), is changed depending on temperature. The lattice parameters of the main phases have been determined. The main mechanism of deformation for this alloy is shown to be grain-boundary sliding. Bulk and grain-boundary diffusion creep and self-regulating diffusion-viscous flow is possible in the γ phase during high-temperature deformation. The heat resistance of this alloy is restricted to 1000°C because of the formation of a γ-phase percolation cluster.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X16070139